JP6152582B2 - Blower - Google Patents

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JP6152582B2
JP6152582B2 JP2012159227A JP2012159227A JP6152582B2 JP 6152582 B2 JP6152582 B2 JP 6152582B2 JP 2012159227 A JP2012159227 A JP 2012159227A JP 2012159227 A JP2012159227 A JP 2012159227A JP 6152582 B2 JP6152582 B2 JP 6152582B2
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inflow
outflow
resonance space
side resonance
case
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JP2014020273A (en
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白濱 誠司
誠司 白濱
谷口 和宏
和宏 谷口
一平 小田
一平 小田
広幸 近藤
広幸 近藤
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Panasonic Intellectual Property Management Co Ltd
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Description

本発明は、室内で気流を発生するファンや、ダクトを介して換気・空調を行う設備機器などに用いられる送風装置に関するものである。   The present invention relates to a fan that is used for a fan that generates an airflow indoors, a facility device that performs ventilation and air conditioning through a duct, and the like.

従来、この種の送風装置は、送風機組立体の基部に設置されたものが知られている(例えば、特許文献1参照)。   Conventionally, this kind of blower is known to be installed at the base of a blower assembly (see, for example, Patent Document 1).

以下、その送風装置について図4を参照しながら説明する。   Hereinafter, the blower will be described with reference to FIG.

図4に示すように、送風機組立体101は、ダクト102を通る空気流を生じさせる送風装置103が、基部104の内部に設置されている。基部104は、外側ケーシング105に形成された空気入口106を有している。空気に高い圧力を加えるのに適した遠心型のインペラ107が、モータ108に連結され、インペラ107の入口109が、基部104の外側ケーシング105に形成された空気入口106と連通している。送風装置103はインペラ107からダクト102への空気流を確立するため、基部104の内部にハウジング110およびディフューザ111を備えている。   As shown in FIG. 4, in the blower assembly 101, a blower 103 that generates an air flow through the duct 102 is installed inside the base 104. The base 104 has an air inlet 106 formed in the outer casing 105. A centrifugal impeller 107 suitable for applying high pressure to air is connected to a motor 108, and an inlet 109 of the impeller 107 communicates with an air inlet 106 formed in the outer casing 105 of the base 104. The blower 103 includes a housing 110 and a diffuser 111 inside the base 104 in order to establish an air flow from the impeller 107 to the duct 102.

上記構成において、送風装置103を作動させると、モータ108が駆動され、インペラ107が回転する。インペラ107の回転による昇圧作用により、空気が空気入口106を介して基部104に吸い込まれ、インペラ107の入口109まで流れ、さらにインペラ107を通過した空気流は、ハウジング110およびディフューザ111の出口112を通り、ダクト102に流入する。   In the above configuration, when the blower 103 is operated, the motor 108 is driven and the impeller 107 rotates. Due to the pressure increasing action by the rotation of the impeller 107, air is sucked into the base 104 through the air inlet 106, flows to the inlet 109 of the impeller 107, and further passes through the impeller 107, and the air flow passes through the housing 110 and the outlet 112 of the diffuser 111. And flows into the duct 102.

特許第4756286号公報Japanese Patent No. 4756286

このような従来の送風装置においては、インペラ107が回転することによる風きり音やハウジング内での空気流の乱れによる乱流音、ディフューザ111に空気流が衝突する衝突音など音源の種類や場所によって特有の周波数を持つ騒音が発生し、空気が流入する空気入口106側と空気が流出するダクト102からそれぞれ異なる周波数の騒音が外部に放射されるという課題を有していた。   In such a conventional blower, the type and location of the sound source such as wind noise caused by the rotation of the impeller 107, turbulent sound caused by the turbulence of the air flow in the housing, and collision sound caused by the air flow colliding with the diffuser 111 Therefore, noise having a specific frequency is generated, and noise having different frequencies is radiated to the outside from the air inlet 106 side through which air flows in and the duct 102 through which air flows out.

本発明は、このような従来の課題を解決するものであり、空気の流入側と流出側でそれぞれ特有の周波数を持つ騒音を低減することができる送風装置を提供することを目的とする。   This invention solves such a conventional subject, and it aims at providing the air blower which can reduce the noise which has a specific frequency on the inflow side and the outflow side of air, respectively.

そして、この目的を達成するために、本発明は、流入開口と流出開口を備えた円筒状の筐体内に、電動機と、前記電動機の回転軸に連結されて回転する遠心羽根車と、前記回転軸に対して同心円上で前記電動機と遠心羽根車とを内包するケースとを備えたファン部とを備え、前記ファン部は、前記遠心羽根車の吸込口に面する流入口と、前記電動機の背面に面する流出口とを備え、前記流入口と流出口は、それぞれ前記筐体との間の隙間により流入側スリット孔と流出側スリット孔を形成して、前記流入開口と流出開口に面しており、前記ケースは、前記流入口側は前記遠心羽根車の形状に沿うような円錐形状であり、前記流出口側は前記流出口に繋がる円錐形状であり、前記ケースと前記円筒状の筐体との間に前記流入側スリット孔を介して連通する流入側共鳴空間と前記流出側スリット孔を介して連通する流出側共鳴空間とを形成ており、前記流入側共鳴空間と前記流入側スリット孔とで流入側共鳴消音機構を形成し、前記流出側共鳴空間と前記流出側スリット孔とで流出側共鳴消音機構を形成した送風装置であって、前記筐体の外形は前記ケースの外形よりも大きくし、前記筐体と前記ケースの間の空間を前記流入側共鳴空間と前記流出側共鳴空間とに仕切る隔壁を備え、前記隔壁に対して、前記遠心送風羽根は前記流入側共鳴空間側に配置し、前記電動機は前記流出側共鳴空間側に配置した送風装置であり、これにより所期の目的を達成するものである。 In order to achieve this object, the present invention provides an electric motor, a centrifugal impeller connected to a rotation shaft of the electric motor, and a rotating impeller in a cylindrical housing having an inflow opening and an outflow opening. A fan section including a case containing the electric motor and the centrifugal impeller concentrically with respect to the shaft, the fan section including an inlet facing the suction opening of the centrifugal impeller, and the electric motor An inflow port facing the back surface, and the inflow port and the outflow port respectively form an inflow side slit hole and an outflow side slit hole by a gap between the casing and face the inflow opening and the outflow opening. The case has a conical shape such that the inlet side conforms to the shape of the centrifugal impeller, the outlet side has a conical shape connected to the outlet, and the case and the cylindrical shape Through the slit on the inflow side between the housing An inflow side resonance space communicating with the inflow side resonance space through the outflow side slit hole is formed, and an inflow side resonance silencer mechanism is formed by the inflow side resonance space and the inflow side slit hole, An air blower in which an outflow side resonance silencer mechanism is formed by an outflow side resonance space and the outflow side slit hole , wherein the outer shape of the housing is larger than the outer shape of the case, and the space between the housing and the case comprising a partition wall for partitioning a space and the inflow-side resonance space and the outflow-side resonance space for the partition wall, the centrifugal fan blades is arranged on the inflow side resonance space side, the electric motor before Symbol outflow side resonance space It is the air blower arrange | positioned by the side, and achieves the intended objective by this.

本発明によれば、空気の流入側と流出側でそれぞれ特有の周波数を持つ騒音を低減することができる送風装置を提供することができる。   ADVANTAGE OF THE INVENTION According to this invention, the air blower which can reduce the noise which has a respectively specific frequency in the inflow side and outflow side of air can be provided.

本発明の実施の形態1の送風装置を示す側断面図Side sectional view which shows the air blower of Embodiment 1 of this invention 同送風装置の下面図Bottom view of the blower 同送風装置の筐体の外形が大きい場合の側断面図Side cross-sectional view when the casing of the blower is large 従来の送風装置を示す側面図Side view showing a conventional blower

本発明の請求項1記載の送風装置は、流入開口と流出開口を備えた円筒状の筐体内に、電動機と、前記電動機の回転軸に連結されて回転する遠心羽根車と、前記回転軸に対して同心円上で前記電動機と遠心羽根車とを内包するケースとを備えたファン部とを備え、前記ファン部は、前記遠心羽根車の吸込口に面する流入口と、前記電動機の背面に面する流出口とを備え、前記流入口と流出口は、それぞれ前記筐体との間の隙間により流入側スリット孔と流出側スリット孔を形成して、前記流入開口と流出開口に面しており、前記ケースは、前記流入口側は前記遠心羽根車の形状に沿うような円錐形状であり、前記流出口側は前記流出口に繋がる円錐形状であり、前記ケースと前記円筒状の筐体との間に前記流入側スリット孔を介して連通する流入側共鳴空間と前記流出側スリット孔を介して連通する流出側共鳴空間とを形成ており、前記流入側共鳴空間と前記流入側スリット孔とで流入側共鳴消音機構を形成し、前記流出側共鳴空間と前記流出側スリット孔とで流出側共鳴消音機構を形成した送風装置であって、前記筐体の外形は前記ケースの外形よりも大きくし、前記筐体と前記ケースの間の空間を前記流入側共鳴空間と前記流出側共鳴空間とに仕切る隔壁を備え、前記隔壁に対して、前記遠心送風羽根は前記流入側共鳴空間側に配置し、前記電動機は前記流出側共鳴空間側に配置した構成を有する。 The blower device according to claim 1 of the present invention includes a motor, a centrifugal impeller connected to the rotating shaft of the motor, and a rotating shaft connected to the rotating shaft of the motor in a cylindrical housing having an inflow opening and an outflow opening. And a fan part including a case containing the electric motor and the centrifugal impeller on a concentric circle, and the fan part has an inlet facing the suction opening of the centrifugal impeller, and a back surface of the electric motor. Facing the inflow opening and the outflow opening by forming an inflow side slit hole and an outflow side slit hole by a gap between the casing and the inflow opening, respectively. The case has a conical shape such that the inlet side follows the shape of the centrifugal impeller, the outlet side has a conical shape connected to the outlet, and the case and the cylindrical casing Communicated with each other via the inflow side slit hole An inflow side resonance space and an outflow side resonance space communicating with the outflow side slit hole are formed, and an inflow side resonance silencer mechanism is formed by the inflow side resonance space and the inflow side slit hole. An air blower in which an outflow side resonance silencer mechanism is formed by a resonance space and the outflow side slit hole , wherein an outer shape of the housing is larger than an outer shape of the case, and a space between the housing and the case is formed. comprising a partition wall for partitioning the said inflow side resonance space and the outflow-side resonance space for the partition wall, the centrifugal fan blades is arranged on the inflow side resonance space side, the electric motor before Symbol outflow side resonance space side It has an arranged configuration.

これにより、ファン部の流入口と流出口からそれぞれ放射される騒音を低減することができるという効果を奏する。   Thereby, there exists an effect that the noise radiated | emitted from the inflow port and outflow port of a fan part can be reduced, respectively.

また、遠心羽根車とケースの距離が遠心羽根車全周で均一になるため、遠心羽根車からケースに流れ出た空気流が全周で均一になり、空気流の乱れが減少し、騒音の発生を抑制することができるという効果を奏する。   In addition, since the distance between the centrifugal impeller and the case is uniform around the entire circumference of the centrifugal impeller, the air flow from the centrifugal impeller to the case is uniform throughout the entire circumference, reducing the turbulence of the air flow and generating noise. There is an effect that can be suppressed.

また、ファン部のケースと筐体の間に形成される流入側共鳴空間と流出側共鳴空間がそれぞれ全周で均一な形状となるため、全周で騒音の主体となる周波数を消音でき、効果的に騒音を低減することができるという効果を奏する。 In addition, since the inflow side resonance space and the outflow side resonance space formed between the case and the case of the fan part have a uniform shape on the entire circumference, it is possible to mute the frequency that is the main component of the noise on the entire circumference. The noise can be reduced.

また、請求項2記載の送風装置は、前記電動機を前記流出口側の円錐形状部に固定しという構成を有する。 Moreover, the air blower according to claim 2 has a configuration in which the electric motor is fixed to the conical portion on the outlet side .

これにより、電動機の発する騒音も流出側共鳴空間で低減することができる。Thereby, the noise which an electric motor emits can also be reduced in the outflow side resonance space.

また、請求項3記載の送風装置は、遠心羽根車は、ターボファン形状であるという構成を有する。 Moreover, the air blower of Claim 3 has the structure that a centrifugal impeller is a turbofan shape.

これにより、遠心羽根車からケースに流れ出た空気流が全周で均一になり、空気流の乱れが減少し、騒音の発生を抑制することができる。   As a result, the air flow flowing out from the centrifugal impeller to the case becomes uniform over the entire circumference, the air flow disturbance is reduced, and the generation of noise can be suppressed.

以下、本発明の実施の形態について図面を参照しながら説明する。   Hereinafter, embodiments of the present invention will be described with reference to the drawings.

(実施の形態1)
図1、図2に示すように、送風装置1は、電動機2と電動機2の回転軸3に連結されて回転するターボファン形状の遠心羽根車4を内包するケース5を備えるファン部6を備え、ファン部6は遠心羽根車4の吸込口7に面する流入口8と、電動機2の背面に面する流出口9を備える。
(Embodiment 1)
As shown in FIGS. 1 and 2, the blower device 1 includes a fan unit 6 including a case 5 that encloses an electric motor 2 and a turbofan-shaped centrifugal impeller 4 that is connected to a rotating shaft 3 of the electric motor 2 and rotates. The fan unit 6 includes an inlet 8 facing the suction port 7 of the centrifugal impeller 4 and an outlet 9 facing the back of the electric motor 2.

図2に示すように、ファン部6のケース5は回転軸3に垂直な任意の平面における断面が遠心羽根車4と同心の円形で、ファン部6の流入口8側は遠心羽根車4の形状に沿うような略円錐形状であり、またファン部6の流出口9側も流出口9に滑らかに繋がる略円錐形状となっている。   As shown in FIG. 2, the case 5 of the fan unit 6 has a circular cross-section in an arbitrary plane perpendicular to the rotation shaft 3 concentric with the centrifugal impeller 4, and the inlet 8 side of the fan unit 6 is the centrifugal impeller 4 side. It has a substantially conical shape that conforms to the shape, and the outlet 9 side of the fan portion 6 has a substantially conical shape that is smoothly connected to the outlet 9.

ファン部6のケース5の回転軸3に垂直な任意の平面における断面が遠心羽根車4と同心の円形であることにより、遠心羽根車4とケース5の距離が遠心羽根車4の全周で均一になり、遠心羽根車4からケース5に流れ出た空気流10が全周で均一になり、空気流10の乱れが減少し、騒音の発生を抑制することができる。   The section of the fan unit 6 in an arbitrary plane perpendicular to the rotating shaft 3 of the case 5 is a concentric circle with the centrifugal impeller 4, so that the distance between the centrifugal impeller 4 and the case 5 is the entire circumference of the centrifugal impeller 4. It becomes uniform, the air flow 10 flowing out from the centrifugal impeller 4 to the case 5 becomes uniform over the entire circumference, the disturbance of the air flow 10 is reduced, and the generation of noise can be suppressed.

ファン部6は筐体11の中に配置される。筐体11はファン部6のケース5と同心の円筒状で、筐体11はそれぞれファン部6の流入口8と流出口9に面する流入開口12と流出開口13を備え、流出開口13はダクト14と繋がっている。   The fan unit 6 is disposed in the housing 11. The casing 11 has a cylindrical shape concentric with the case 5 of the fan unit 6, and the casing 11 includes an inflow opening 12 and an outflow opening 13 facing the inflow port 8 and the outflow port 9 of the fan unit 6, respectively. It is connected to the duct 14.

ファン部6の流入口8の周囲には、筐体11とファン部6のケース5によって囲まれた流入側共鳴空間15が形成され、またファン部6の流入口8の周囲には筐体11とファン部6との間の隙間により流入側スリット孔16が形成される。流入側スリット孔16がファン部6の流入口8と流入側共鳴空間15を連通させ、流入側共鳴消音機構を形成する。   An inflow side resonance space 15 surrounded by the casing 11 and the case 5 of the fan unit 6 is formed around the inlet 8 of the fan unit 6, and the casing 11 is formed around the inlet 8 of the fan unit 6. An inflow side slit hole 16 is formed by a gap between the fan portion 6 and the fan portion 6. The inflow side slit hole 16 communicates the inlet 8 of the fan unit 6 with the inflow side resonance space 15 to form an inflow side resonance silencer mechanism.

ファン部6の流入口8側と同様に、ファン部6の流出口9でも筐体11とファン部6のケース5によって囲まれて形成される流出側共鳴空間17と、ファン部6の流出口9と流出側共鳴空間17を連通する流出側スリット孔18とで流出側共鳴消音機構を形成する。   Similarly to the inflow port 8 side of the fan unit 6, the outflow side resonance space 17 formed by being surrounded by the casing 11 and the case 5 of the fan unit 6 at the outflow port 9 of the fan unit 6, and the outflow port of the fan unit 6 9 and the outflow side slit 18 that communicates with the outflow side resonance space 17 form an outflow side resonance silencer mechanism.

このような構成によれば、図1に示すように、電動機2から駆動力を与えて遠心羽根車4を回転させることにより、空気流10が筐体11の流入開口12とファン部6の流入口8を順次通って遠心羽根車4の吸込口7に導かれ、遠心羽根車4によって昇圧されファン部6のケース5へと吹き出され、ファン部6のケース5を通る際に徐々に動圧が静圧に変換されながら、ファン部6の流出口9から筐体11の流出開口13を介してダクト14へ排出される。   According to such a configuration, as shown in FIG. 1, when the centrifugal impeller 4 is rotated by applying a driving force from the electric motor 2, the air flow 10 flows between the inflow opening 12 of the housing 11 and the flow of the fan unit 6. The air is passed through the inlet 8 sequentially to the suction port 7 of the centrifugal impeller 4, and the pressure is increased by the centrifugal impeller 4 and blown out to the case 5 of the fan unit 6. Is discharged from the outlet 9 of the fan unit 6 to the duct 14 through the outlet opening 13 of the housing 11 while being converted into static pressure.

このとき、遠心羽根車4の回転騒音や、ケース5の内部で発生する乱流騒音など各種騒音が発生し、その音波が、ファン部6の流入口8、流出口9を介してそれぞれ筐体11の流入開口12、流出開口13から放射される。   At this time, various noises such as rotational noise of the centrifugal impeller 4 and turbulent noise generated inside the case 5 are generated, and the sound waves are respectively transmitted through the inlet 8 and the outlet 9 of the fan unit 6. 11 from the inflow opening 12 and the outflow opening 13.

筐体11の流入開口12において、騒音の音波の一部は、流入側スリット孔16から流入側共鳴空間15に入射するが、流入側スリット孔16と流入側共鳴空間15とで共鳴型消音構造が形成されているため、入射した騒音の音波のうち、共鳴型消音構造の共鳴周波数と一致する周波数の音波の一部が消音され、筐体11の流入開口12から外部に放出される騒音を低減することができる。   In the inflow opening 12 of the housing 11, a part of the sound wave of noise enters the inflow side resonance space 15 from the inflow side slit hole 16, but the resonance type silencing structure is formed by the inflow side slit hole 16 and the inflow side resonance space 15. Therefore, a part of the sound wave having a frequency that coincides with the resonance frequency of the resonance type silencing structure is silenced among the sound waves of the incident noise, and noise emitted to the outside from the inflow opening 12 of the housing 11 is reduced. Can be reduced.

筐体11の流出開口13側でも同様に、騒音の音波の一部が流出側スリット孔18から流出側共鳴空間17に入射するが、流出側スリット孔18と流出側共鳴空間17とで共鳴型消音構造が形成されているため、入射した騒音の音波のうち、共鳴型消音構造の共鳴周波数と一致する周波数の音波の一部が消音され、筐体11の流出開口13からダクト14に放出される騒音を低減することができる。   Similarly, a part of the sound wave of noise enters the outflow side resonance space 17 from the outflow side slit hole 18 on the outflow opening 13 side of the housing 11, but the outflow side slit hole 18 and the outflow side resonance space 17 are resonant. Since the sound deadening structure is formed, a part of the sound wave of the incident noise sound wave having the same frequency as the resonance frequency of the resonance type sound deadening structure is muted and emitted to the duct 14 from the outflow opening 13 of the housing 11. Noise can be reduced.

ここで、消音したい周波数が複数、例えば2種類ある場合、流入側共鳴消音機構の消音特性と流出側共鳴消音機構の消音特性が異なるように構成すればよい。   Here, when there are a plurality of, for example, two types of frequencies to be silenced, the silencer characteristics of the inflow side resonance silencer mechanism and the silencer characteristics of the outflow side resonance silencer mechanism may be different.

すなわち、ファン部6の流入口8と流出口9からそれぞれ特有の周波数で騒音が放射される場合、流入側スリット孔16と流出側スリット孔18の幅や、流入側共鳴空間15と流出側共鳴空間17の体積をそれぞれ調整し、流入側共鳴消音機構の消音特性と流出側共鳴消音機構の消音特性を異ならせることができる。   That is, when noise is radiated from the inflow port 8 and the outflow port 9 of the fan unit 6 at specific frequencies, the width of the inflow side slit hole 16 and the outflow side slit hole 18, the inflow side resonance space 15, and the outflow side resonance. The volume of the space 17 can be adjusted to change the silencing characteristics of the inflow side resonance silencing mechanism and the silencing characteristics of the outflow side resonance silencing mechanism.

このように、流入側共鳴消音機構の消音特性と流出側共鳴消音機構の消音特性をそれぞれの騒音の周波数に適合させることにより、効果的に騒音を低減することができる。   Thus, noise can be effectively reduced by adapting the silencing characteristics of the inflow side resonance silencing mechanism and the silencing characteristics of the outflow side resonance silencing mechanism to the respective noise frequencies.

ここで、筐体11がファン部6のケース5と同心の円筒状であるため、ファン部6のケース5と筐体11の間に形成される流入側共鳴空間15と流出側共鳴空間17がそれぞれ全周で均一な形状となるため、全周で騒音の主体となる周波数を消音でき、効果的に騒音を低減することができる。   Here, since the housing 11 has a cylindrical shape concentric with the case 5 of the fan unit 6, the inflow side resonance space 15 and the outflow side resonance space 17 formed between the case 5 of the fan unit 6 and the housing 11 are formed. Since each has a uniform shape on the entire circumference, it is possible to mute the main frequency of noise on the entire circumference and effectively reduce the noise.

なお、本実施の形態では筐体11を小型化するために外形をファン部6と同等としたが、図3に示すように、筐体11の外形がファン部6の外形より大きい場合でも、流入側共鳴空間15と流出側共鳴空間17を仕切る隔壁19を備えれば、同様の効果を得ることができる。隔壁19は流入側共鳴空間15と流出側共鳴空間17それぞれに備えていても良い。さらに、隔壁19の位置を変えることにより、流入側共鳴空間15と流出側共鳴空間17の容積を変更することができるため、消音できる周波数の適合範囲を広げることができる。例えば流入側で比較的高周波の騒音を消音したい場合は、流入側共鳴空間15の容積が小さくなるように隔壁19を配置すれば良く、比較的低周波の騒音を消音したい場合は流入側共鳴空間15の容積が大きくなるように隔壁19を配置すればよい。   In the present embodiment, the outer shape is made equal to the fan unit 6 in order to reduce the size of the housing 11, but as shown in FIG. 3, even when the outer shape of the housing 11 is larger than the outer shape of the fan unit 6, The same effect can be obtained if the partition wall 19 that partitions the inflow side resonance space 15 and the outflow side resonance space 17 is provided. The partition wall 19 may be provided in each of the inflow side resonance space 15 and the outflow side resonance space 17. Furthermore, since the volume of the inflow side resonance space 15 and the outflow side resonance space 17 can be changed by changing the position of the partition wall 19, the frequency matching range in which noise can be silenced can be expanded. For example, when it is desired to mute relatively high-frequency noise on the inflow side, the partition wall 19 may be arranged so that the volume of the inflow-side resonance space 15 is small. When it is desired to mute relatively low-frequency noise, the inflow-side resonance space is sufficient. What is necessary is just to arrange | position the partition 19 so that the volume of 15 may become large.

なお、ファン部6の流出口9側に遠心羽根車4から流出口9に空気流を導くディフューザを備えると、遠心羽根車4の効率が向上されることにより、回転数を低減して回転騒音を抑制でき、またケース5の内部で発生する乱流騒音を抑制できるため、なお良い。   If the diffuser for guiding the air flow from the centrifugal impeller 4 to the outlet 9 is provided on the outlet 9 side of the fan unit 6, the efficiency of the centrifugal impeller 4 is improved, thereby reducing the rotational speed and rotating noise. It is even better because turbulent noise generated inside the case 5 can be suppressed.

また、なんらかの制限によって流入側スリット孔16や流入側共鳴空間15が周方向に分割されたり、流入側共鳴空間15の容積が周方向に不均一であったり、流入側共鳴空間15の内部に部品などが配置されていたりしても、共鳴消音機構を形成していれば、効果の程度が劣るが、同様の効果を得ることができる。   Further, the inflow side slit hole 16 and the inflow side resonance space 15 are divided in the circumferential direction due to some restrictions, the volume of the inflow side resonance space 15 is not uniform in the circumferential direction, or there are parts inside the inflow side resonance space 15. However, if the resonance silencer mechanism is formed, the effect is inferior, but the same effect can be obtained.

例えば本実施形態では筐体11が円筒の場合を説明したが、角筒の場合は流入側共鳴空間15が周方向に分割される、もしくは、流入側共鳴空間15の容積が周方向に不均一になってしまうが、共鳴消音機構を形成することができるため、共鳴周波数と一致する周波数の音波の一部を消音することができる。これは流出口9側の共鳴消音機構についても同様である。   For example, in the present embodiment, the case is described in which the casing 11 is a cylinder. However, in the case of a rectangular tube, the inflow side resonance space 15 is divided in the circumferential direction, or the volume of the inflow side resonance space 15 is not uniform in the circumferential direction. However, since a resonance silencer mechanism can be formed, a part of the sound wave having a frequency that matches the resonance frequency can be silenced. The same applies to the resonance silencer mechanism on the outlet 9 side.

本発明の送風装置は、室内で気流を発生するファンや、ダクトを介して換気・空調を行う設備機器などに用いられる送風装置として有用である。   The blower of the present invention is useful as a blower used for a fan that generates an air flow indoors, a facility device that performs ventilation and air conditioning through a duct, and the like.

1 送風装置
2 電動機
3 回転軸
4 遠心羽根車
5 ケース
6 ファン部
7 吸込口
8 流入口
9 流出口
10 空気流
11 筐体
12 流入開口
13 流出開口
14 ダクト
15 流入側共鳴空間
16 流入側スリット孔
17 流出側共鳴空間
18 流出側スリット孔
19 隔壁
DESCRIPTION OF SYMBOLS 1 Blower 2 Electric motor 3 Rotating shaft 4 Centrifugal impeller 5 Case 6 Fan part 7 Suction port 8 Inlet 9 Outlet 10 Air flow 11 Case 12 Inflow opening 13 Outflow opening 14 Duct 15 Inflow side resonance space 16 Inlet side slit hole 17 Outflow side resonance space 18 Outflow side slit hole 19 Bulkhead

Claims (3)

流入開口と流出開口を備えた円筒状の筐体内に、電動機と、前記電動機の回転軸に連結されて回転する遠心羽根車と、前記回転軸に対して同心円上で前記電動機と遠心羽根車とを内包するケースとを備えたファン部とを備え、
前記ファン部は、前記遠心羽根車の吸込口に面する流入口と、前記電動機の背面に面する流出口とを備え、前記流入口と流出口は、それぞれ前記筐体との間の隙間により流入側スリット孔と流出側スリット孔を形成して、前記流入開口と流出開口に面しており、
前記ケースは、前記流入口側は前記遠心羽根車の形状に沿うような円錐形状であり、前記流出口側は前記流出口に繋がる円錐形状であり、
前記ケースと前記円筒状の筐体との間に前記流入側スリット孔を介して連通する流入側共鳴空間と前記流出側スリット孔を介して連通する流出側共鳴空間とを形成ており、
前記流入側共鳴空間と前記流入側スリット孔とで流入側共鳴消音機構を形成し、前記流出側共鳴空間と前記流出側スリット孔とで流出側共鳴消音機構を形成した送風装置であって、
前記筐体の外形は前記ケースの外形よりも大きくし、前記筐体と前記ケースの間の空間を前記流入側共鳴空間と前記流出側共鳴空間とに仕切る隔壁を備え、
前記隔壁に対して、前記遠心送風羽根は前記流入側共鳴空間側に配置し、前記電動機は前記流出側共鳴空間側に配置した送風装置。
In a cylindrical housing having an inflow opening and an outflow opening, an electric motor, a centrifugal impeller connected to the rotating shaft of the electric motor and rotating, and the electric motor and the centrifugal impeller concentrically with respect to the rotating shaft And a fan part with a case containing
The fan part includes an inlet facing the suction port of the centrifugal impeller and an outlet facing the back surface of the electric motor, and the inlet and the outlet are each formed by a gap between the casings. Forming an inflow side slit hole and an outflow side slit hole, facing the inflow opening and the outflow opening;
The case has a conical shape such that the inlet side follows the shape of the centrifugal impeller, and the outlet side has a conical shape connected to the outlet.
An inflow side resonance space communicating with the inflow side slit hole and an outflow side resonance space communicating with the outflow side slit hole are formed between the case and the cylindrical casing,
An inflow device that forms an inflow side resonance silencing mechanism with the inflow side resonance space and the inflow side slit hole, and an outflow side resonance silencing mechanism with the outflow side resonance space and the outflow side slit hole ,
The outer shape of the housing is larger than the outer shape of the case, and includes a partition that partitions the space between the housing and the case into the inflow side resonance space and the outflow side resonance space,
With respect to the partition wall, the centrifugal fan blades is arranged on the inflow side resonance space side, the electric motor blower disposed in front Symbol outflow side resonance space side.
前記電動機を前記流出口側の円錐形状部に固定した請求項1記載の送風装置。The blower according to claim 1, wherein the electric motor is fixed to the conical portion on the outlet side. 前記遠心羽根車は、ターボファン形状である請求項1記載の送風装置。
The blower according to claim 1, wherein the centrifugal impeller has a turbofan shape.
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